build: re-add missing CPPFLAGS for libiptc
These got lost on commit v1.4.11-12-g5c8f5b6.
Note: When /usr/include/libiptc/libiptc.h exists, this error is
masked away :-/ (IMO, #include-with-quotes "foo.h" should not
search system dirs...)
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
diff --git a/libiptc/Makefile.am b/libiptc/Makefile.am
index a7d0ea2..22c920f 100644
--- a/libiptc/Makefile.am
+++ b/libiptc/Makefile.am
@@ -1,5 +1,8 @@
# -*- Makefile -*-
+AM_CFLAGS = ${regular_CFLAGS}
+AM_CPPFLAGS = ${regular_CPPFLAGS} -I${top_builddir}/include -I${top_srcdir}/include ${kinclude_CPPFLAGS}
+
pkgconfig_DATA = libiptc.pc
lib_LTLIBRARIES = libip4tc.la libip6tc.la libiptc.la
